/*
 * Copyright (c) 2024 QMJY.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *        https://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */

package io.github.qmjy.mapserver.util;

import com.wdtinc.mapbox_vector_tile.adapt.jts.MvtReader;
import com.wdtinc.mapbox_vector_tile.adapt.jts.TagKeyValueMapConverter;
import com.wdtinc.mapbox_vector_tile.adapt.jts.model.JtsMvt;
import org.locationtech.jts.geom.GeometryFactory;

import java.io.IOException;
import java.io.InputStream;
import java.util.Optional;

/**
 * 读取MVT数据
 */
public class VectorTileUtils {
    private static final GeometryFactory geomFactory = new GeometryFactory();

    public static Optional<JtsMvt> decodeJtsMvt(InputStream inputStream) {
        try {
            return Optional.of(MvtReader.loadMvt(inputStream, geomFactory, new TagKeyValueMapConverter()));
        } catch (IOException e) {
            return Optional.empty();
        }
    }
}
